2 * OSS compatible sequencer driver
4 * synth device handlers
6 * Copyright (C) 1998,99 Takashi Iwai <tiwai@suse.de>
8 * This program is free software; you can redistribute it and/or modify
9 * it under the terms of the GNU General Public License as published by
10 * the Free Software Foundation; either version 2 of the License, or
11 * (at your option) any later version.
13 * This program is distributed in the hope that it will be useful,
14 * but WITHOUT ANY WARRANTY; without even the implied warranty of
15 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
16 * GNU General Public License for more details.
18 * You should have received a copy of the GNU General Public License
19 * along with this program; if not, write to the Free Software
20 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
23 #include "seq_oss_synth.h"
24 #include "seq_oss_midi.h"
25 #include "../seq_lock.h"
26 #include <linux/init.h>
27 #include <linux/module.h>
28 #include <linux/slab.h>
29 #include <linux/nospec.h>
34 #define SNDRV_SEQ_OSS_MAX_SYNTH_NAME 30
35 #define MAX_SYSEX_BUFLEN 128
39 * definition of synth info records
43 struct seq_oss_synth_sysex {
46 unsigned char buf[MAX_SYSEX_BUFLEN];
50 struct seq_oss_synth {
58 char name[SNDRV_SEQ_OSS_MAX_SYNTH_NAME];
59 struct snd_seq_oss_callback oper;
64 snd_use_lock_t use_lock;
71 static int max_synth_devs;
72 static struct seq_oss_synth *synth_devs[SNDRV_SEQ_OSS_MAX_SYNTH_DEVS];
73 static struct seq_oss_synth midi_synth_dev = {
75 .synth_type = SYNTH_TYPE_MIDI,
81 static DEFINE_SPINLOCK(register_lock);
86 static struct seq_oss_synth *get_synthdev(struct seq_oss_devinfo *dp, int dev);
87 static void reset_channels(struct seq_oss_synthinfo *info);
90 * global initialization
93 snd_seq_oss_synth_init(void)
95 snd_use_lock_init(&midi_synth_dev.use_lock);
99 * registration of the synth device
102 snd_seq_oss_synth_probe(struct device *_dev)
104 struct snd_seq_device *dev = to_seq_dev(_dev);
106 struct seq_oss_synth *rec;
107 struct snd_seq_oss_reg *reg = SNDRV_SEQ_DEVICE_ARGPTR(dev);
110 rec = kzalloc(sizeof(*rec), GFP_KERNEL);
113 rec->seq_device = -1;
114 rec->synth_type = reg->type;
115 rec->synth_subtype = reg->subtype;
116 rec->nr_voices = reg->nvoices;
117 rec->oper = reg->oper;
118 rec->private_data = reg->private_data;
120 snd_use_lock_init(&rec->use_lock);
122 /* copy and truncate the name of synth device */
123 strlcpy(rec->name, dev->name, sizeof(rec->name));
126 spin_lock_irqsave(®ister_lock, flags);
127 for (i = 0; i < max_synth_devs; i++) {
128 if (synth_devs[i] == NULL)
131 if (i >= max_synth_devs) {
132 if (max_synth_devs >= SNDRV_SEQ_OSS_MAX_SYNTH_DEVS) {
133 spin_unlock_irqrestore(®ister_lock, flags);
134 pr_err("ALSA: seq_oss: no more synth slot\n");
142 spin_unlock_irqrestore(®ister_lock, flags);
143 dev->driver_data = rec;
144 #ifdef SNDRV_OSS_INFO_DEV_SYNTH
146 snd_oss_info_register(SNDRV_OSS_INFO_DEV_SYNTH, i, rec->name);
153 snd_seq_oss_synth_remove(struct device *_dev)
155 struct snd_seq_device *dev = to_seq_dev(_dev);
157 struct seq_oss_synth *rec = dev->driver_data;
160 spin_lock_irqsave(®ister_lock, flags);
161 for (index = 0; index < max_synth_devs; index++) {
162 if (synth_devs[index] == rec)
165 if (index >= max_synth_devs) {
166 spin_unlock_irqrestore(®ister_lock, flags);
167 pr_err("ALSA: seq_oss: can't unregister synth\n");
170 synth_devs[index] = NULL;
171 if (index == max_synth_devs - 1) {
172 for (index--; index >= 0; index--) {
173 if (synth_devs[index])
176 max_synth_devs = index + 1;
178 spin_unlock_irqrestore(®ister_lock, flags);
179 #ifdef SNDRV_OSS_INFO_DEV_SYNTH
180 if (rec->seq_device < SNDRV_CARDS)
181 snd_oss_info_unregister(SNDRV_OSS_INFO_DEV_SYNTH, rec->seq_device);
184 snd_use_lock_sync(&rec->use_lock);
193 static struct seq_oss_synth *
196 struct seq_oss_synth *rec;
199 spin_lock_irqsave(®ister_lock, flags);
200 rec = synth_devs[dev];
202 snd_use_lock_use(&rec->use_lock);
203 spin_unlock_irqrestore(®ister_lock, flags);
209 * set up synth tables
213 snd_seq_oss_synth_setup(struct seq_oss_devinfo *dp)
216 struct seq_oss_synth *rec;
217 struct seq_oss_synthinfo *info;
219 dp->max_synthdev = max_synth_devs;
220 dp->synth_opened = 0;
221 memset(dp->synths, 0, sizeof(dp->synths));
222 for (i = 0; i < dp->max_synthdev; i++) {
226 if (rec->oper.open == NULL || rec->oper.close == NULL) {
227 snd_use_lock_free(&rec->use_lock);
230 info = &dp->synths[i];
231 info->arg.app_index = dp->port;
232 info->arg.file_mode = dp->file_mode;
233 info->arg.seq_mode = dp->seq_mode;
234 if (dp->seq_mode == SNDRV_SEQ_OSS_MODE_SYNTH)
235 info->arg.event_passing = SNDRV_SEQ_OSS_PROCESS_EVENTS;
237 info->arg.event_passing = SNDRV_SEQ_OSS_PASS_EVENTS;
239 if (!try_module_get(rec->oper.owner)) {
240 snd_use_lock_free(&rec->use_lock);
243 if (rec->oper.open(&info->arg, rec->private_data) < 0) {
244 module_put(rec->oper.owner);
245 snd_use_lock_free(&rec->use_lock);
248 info->nr_voices = rec->nr_voices;
249 if (info->nr_voices > 0) {
250 info->ch = kcalloc(info->nr_voices, sizeof(struct seq_oss_chinfo), GFP_KERNEL);
252 rec->oper.close(&info->arg);
253 module_put(rec->oper.owner);
254 snd_use_lock_free(&rec->use_lock);
257 reset_channels(info);
262 snd_use_lock_free(&rec->use_lock);
268 * set up synth tables for MIDI emulation - /dev/music mode only
272 snd_seq_oss_synth_setup_midi(struct seq_oss_devinfo *dp)
276 if (dp->max_synthdev >= SNDRV_SEQ_OSS_MAX_SYNTH_DEVS)
279 for (i = 0; i < dp->max_mididev; i++) {
280 struct seq_oss_synthinfo *info;
281 info = &dp->synths[dp->max_synthdev];
282 if (snd_seq_oss_midi_open(dp, i, dp->file_mode) < 0)
284 info->arg.app_index = dp->port;
285 info->arg.file_mode = dp->file_mode;
286 info->arg.seq_mode = dp->seq_mode;
287 info->arg.private_data = info;
289 info->midi_mapped = i;
290 info->arg.event_passing = SNDRV_SEQ_OSS_PASS_EVENTS;
291 snd_seq_oss_midi_get_addr(dp, i, &info->arg.addr);
293 midi_synth_dev.opened++;
295 if (dp->max_synthdev >= SNDRV_SEQ_OSS_MAX_SYNTH_DEVS)
302 * clean up synth tables
306 snd_seq_oss_synth_cleanup(struct seq_oss_devinfo *dp)
309 struct seq_oss_synth *rec;
310 struct seq_oss_synthinfo *info;
312 if (snd_BUG_ON(dp->max_synthdev > SNDRV_SEQ_OSS_MAX_SYNTH_DEVS))
314 for (i = 0; i < dp->max_synthdev; i++) {
315 info = &dp->synths[i];
319 if (midi_synth_dev.opened > 0) {
320 snd_seq_oss_midi_close(dp, info->midi_mapped);
321 midi_synth_dev.opened--;
327 if (rec->opened > 0) {
328 rec->oper.close(&info->arg);
329 module_put(rec->oper.owner);
332 snd_use_lock_free(&rec->use_lock);
339 dp->synth_opened = 0;
340 dp->max_synthdev = 0;
343 static struct seq_oss_synthinfo *
344 get_synthinfo_nospec(struct seq_oss_devinfo *dp, int dev)
346 if (dev < 0 || dev >= dp->max_synthdev)
348 dev = array_index_nospec(dev, SNDRV_SEQ_OSS_MAX_SYNTH_DEVS);
349 return &dp->synths[dev];
353 * return synth device information pointer
355 static struct seq_oss_synth *
356 get_synthdev(struct seq_oss_devinfo *dp, int dev)
358 struct seq_oss_synth *rec;
359 struct seq_oss_synthinfo *info = get_synthinfo_nospec(dp, dev);
366 rec = &midi_synth_dev;
367 snd_use_lock_use(&rec->use_lock);
374 snd_use_lock_free(&rec->use_lock);
382 * reset note and velocity on each channel.
385 reset_channels(struct seq_oss_synthinfo *info)
388 if (info->ch == NULL || ! info->nr_voices)
390 for (i = 0; i < info->nr_voices; i++) {
391 info->ch[i].note = -1;
398 * reset synth device:
399 * call reset callback. if no callback is defined, send a heartbeat
400 * event to the corresponding port.
403 snd_seq_oss_synth_reset(struct seq_oss_devinfo *dp, int dev)
405 struct seq_oss_synth *rec;
406 struct seq_oss_synthinfo *info;
408 info = get_synthinfo_nospec(dp, dev);
409 if (!info || !info->opened)
412 info->sysex->len = 0; /* reset sysex */
413 reset_channels(info);
415 if (midi_synth_dev.opened <= 0)
417 snd_seq_oss_midi_reset(dp, info->midi_mapped);
418 /* reopen the device */
419 snd_seq_oss_midi_close(dp, dev);
420 if (snd_seq_oss_midi_open(dp, info->midi_mapped,
421 dp->file_mode) < 0) {
422 midi_synth_dev.opened--;
435 if (rec->oper.reset) {
436 rec->oper.reset(&info->arg);
438 struct snd_seq_event ev;
439 memset(&ev, 0, sizeof(ev));
440 snd_seq_oss_fill_addr(dp, &ev, info->arg.addr.client,
441 info->arg.addr.port);
442 ev.type = SNDRV_SEQ_EVENT_RESET;
443 snd_seq_oss_dispatch(dp, &ev, 0, 0);
445 snd_use_lock_free(&rec->use_lock);
450 * load a patch record:
451 * call load_patch callback function
454 snd_seq_oss_synth_load_patch(struct seq_oss_devinfo *dp, int dev, int fmt,
455 const char __user *buf, int p, int c)
457 struct seq_oss_synth *rec;
458 struct seq_oss_synthinfo *info;
461 info = get_synthinfo_nospec(dp, dev);
467 if ((rec = get_synthdev(dp, dev)) == NULL)
470 if (rec->oper.load_patch == NULL)
473 rc = rec->oper.load_patch(&info->arg, fmt, buf, p, c);
474 snd_use_lock_free(&rec->use_lock);
479 * check if the device is valid synth device and return the synth info
481 struct seq_oss_synthinfo *
482 snd_seq_oss_synth_info(struct seq_oss_devinfo *dp, int dev)
484 struct seq_oss_synth *rec;
486 rec = get_synthdev(dp, dev);
488 snd_use_lock_free(&rec->use_lock);
489 return get_synthinfo_nospec(dp, dev);
496 * receive OSS 6 byte sysex packet:
497 * the full sysex message will be sent if it reaches to the end of data
501 snd_seq_oss_synth_sysex(struct seq_oss_devinfo *dp, int dev, unsigned char *buf, struct snd_seq_event *ev)
505 struct seq_oss_synth_sysex *sysex;
506 struct seq_oss_synthinfo *info;
508 info = snd_seq_oss_synth_info(dp, dev);
514 sysex = kzalloc(sizeof(*sysex), GFP_KERNEL);
521 dest = sysex->buf + sysex->len;
522 /* copy 6 byte packet to the buffer */
523 for (i = 0; i < 6; i++) {
524 if (buf[i] == 0xff) {
530 if (sysex->len >= MAX_SYSEX_BUFLEN) {
537 if (sysex->len && send) {
541 return -EINVAL; /* skip */
543 /* copy the data to event record and send it */
544 ev->flags = SNDRV_SEQ_EVENT_LENGTH_VARIABLE;
545 if (snd_seq_oss_synth_addr(dp, dev, ev))
547 ev->data.ext.len = sysex->len;
548 ev->data.ext.ptr = sysex->buf;
553 return -EINVAL; /* skip */
557 * fill the event source/destination addresses
560 snd_seq_oss_synth_addr(struct seq_oss_devinfo *dp, int dev, struct snd_seq_event *ev)
562 struct seq_oss_synthinfo *info = snd_seq_oss_synth_info(dp, dev);
566 snd_seq_oss_fill_addr(dp, ev, info->arg.addr.client,
567 info->arg.addr.port);
573 * OSS compatible ioctl
576 snd_seq_oss_synth_ioctl(struct seq_oss_devinfo *dp, int dev, unsigned int cmd, unsigned long addr)
578 struct seq_oss_synth *rec;
579 struct seq_oss_synthinfo *info;
582 info = get_synthinfo_nospec(dp, dev);
583 if (!info || info->is_midi)
585 if ((rec = get_synthdev(dp, dev)) == NULL)
587 if (rec->oper.ioctl == NULL)
590 rc = rec->oper.ioctl(&info->arg, cmd, addr);
591 snd_use_lock_free(&rec->use_lock);
597 * send OSS raw events - SEQ_PRIVATE and SEQ_VOLUME
600 snd_seq_oss_synth_raw_event(struct seq_oss_devinfo *dp, int dev, unsigned char *data, struct snd_seq_event *ev)
602 struct seq_oss_synthinfo *info;
604 info = snd_seq_oss_synth_info(dp, dev);
605 if (!info || info->is_midi)
607 ev->type = SNDRV_SEQ_EVENT_OSS;
608 memcpy(ev->data.raw8.d, data, 8);
609 return snd_seq_oss_synth_addr(dp, dev, ev);
614 * create OSS compatible synth_info record
617 snd_seq_oss_synth_make_info(struct seq_oss_devinfo *dp, int dev, struct synth_info *inf)
619 struct seq_oss_synth *rec;
620 struct seq_oss_synthinfo *info = get_synthinfo_nospec(dp, dev);
626 struct midi_info minf;
627 if (snd_seq_oss_midi_make_info(dp, info->midi_mapped, &minf))
629 inf->synth_type = SYNTH_TYPE_MIDI;
630 inf->synth_subtype = 0;
633 strlcpy(inf->name, minf.name, sizeof(inf->name));
635 if ((rec = get_synthdev(dp, dev)) == NULL)
637 inf->synth_type = rec->synth_type;
638 inf->synth_subtype = rec->synth_subtype;
639 inf->nr_voices = rec->nr_voices;
641 strlcpy(inf->name, rec->name, sizeof(inf->name));
642 snd_use_lock_free(&rec->use_lock);
648 #ifdef CONFIG_SND_PROC_FS
653 snd_seq_oss_synth_info_read(struct snd_info_buffer *buf)
656 struct seq_oss_synth *rec;
658 snd_iprintf(buf, "\nNumber of synth devices: %d\n", max_synth_devs);
659 for (i = 0; i < max_synth_devs; i++) {
660 snd_iprintf(buf, "\nsynth %d: ", i);
663 snd_iprintf(buf, "*empty*\n");
666 snd_iprintf(buf, "[%s]\n", rec->name);
667 snd_iprintf(buf, " type 0x%x : subtype 0x%x : voices %d\n",
668 rec->synth_type, rec->synth_subtype,
670 snd_iprintf(buf, " capabilities : ioctl %s / load_patch %s\n",
671 enabled_str((long)rec->oper.ioctl),
672 enabled_str((long)rec->oper.load_patch));
673 snd_use_lock_free(&rec->use_lock);
676 #endif /* CONFIG_SND_PROC_FS */